Syringe



A. CHANCE.

SYRINGE. APPLICATION FILED JULY 9, I917- 1,331,805. Patefi'ted Feb.24,1920.

awugmtoz nnrnzn srArE-s agent: orn cn ALBERT CHANCE, or PHILADELPHIA,PENNSYLVANIA, ASSIGNOR TO THE s. s. WHITE DENTAL MANUFACTURING COMPANY,A CORPORATION or rENNsvLvANI To all whom it may concern: i

Be it known that}, ALBERT CHANGE, a citizen of the United States, and aresident of Philadelphia, county of Philadelphia, State of Pennsylvania,have invented certain new and useful Improvements in Syringes, of whichthe following is a specification, reference being had to theaccompanying drawmgs.

My invention relates particularly to that class of syringes which arecommonly known as hypodermic syrlnges, and which arepro- V videdwithapiston or plunger. for ejecting the contents,.and isflespeciallydirected to the means by which it may be grasped by-the operator indischarging its contents. 1

The principal objects of my invention are to provide a syringe inwhichthe parts may be readily assembled and separated for cleansing andsterilizing, and in which the finger-grip is adjustableto accommodatethe operators grasp. j 1 7 Other objects of my invention are to pro-Vide a syringe having an ejecting plunger so formed as to insure thecomplete dis-,

charge of the contents of the syringe barrel and to provide said plungerwith a handle frictionally engaged therewith, and readily.

separated therefrom.

Specifically stated, the form of my invention as hereinafter described,comprehends. a syringe having a barrel provided with. shoulders betweenwhich a removable fingergrip may be rotatably clasped, and a plungerhaving a shoulder forming a piston entirely filling the barrel chamber,and having a split handle.

My invention also includes all of the various novel features ofconstruction and arrangement as hereinafter more definitely specified.

In the accompanying drawings, Figure 1' is a perspective View of asyringe constructed in accordance with my invention; Fig. 2 is aperspective view of the barrel or body of the syringe shown in 1; Fig. 3is a perspective view of the piston plunger showing its handle detached,also in perspective; and'Fig. 4 is a perspective view of the finger-gripper 86, having its clasp opened,

In said figures, the body or barrel 1 of the syringe is provided with anozzle2secured by the flange 3 to the discharge end of said barrel 1,said flange forming a groove, sur- .g

rounding the outlet passage-way in said nozsYRI GE.

zle, into which groove "the discharge end of axis. ofthe'barrel 1, andthe relatively mov-- able parts thereof'are connected by the hinge ilyseparated from the barrel l-for' con-venience of cleansing andsterilizing. I

The finger-grip 9 may be rotatably engaged with the barrel 1 by theclasp, having the hasp 13 which is oscillatably,v connected with thetrunnions 15 on the lower member 16 of said finger-grip, and which ispro Patented Feb. 24, 1920;

'Applicationfiled zrui e, 1917'. SerialNo.179,302..

' 12 which permits said'finger-grip .to be readvided with laterallyextended projections 17 arranged to engage suitably provided projectingfingers 19 on the uppermember 20 i i of said finger-grip as best shownin Fig. 1.

The syringe is provided with the plunger 22, which as best shown in Fig.3, is provided with apiston 23, and has a shoulder 25 forming a stop forsaid plunger, arranged to 1 engage the rear end or flange 6, of-thebarrel '1. Said plunger is also provided with a re-,

duced end 26 for engagement of the handle 27, conveniently formed withwings 29 for engagement with the palm of the hand of the operator, andhaving the boss 30 providing a socket 31 to receive the reduced end26'of the plunger, said boss being split 1ongitudinally by the saw-cut32 affording a slight spring action by which said handle may befrictionally engaged with said plunger when slipped onto the reducedend26 thereof. I

The barrel 1 of the syringe which may be formed of glass or othertransparent material may be conveniently provided with graduations 35 sospaced as'to indicate given quantities of material, corresponding to thecubical contents of the barrel indicated by said graduations, so that asthe plunger is withdrawn, the'material sucked into the syringe by thewithdrawing action of the plunger, which causes a vacuum to draw thematerial into the barrel, maybe aged by the endof'the plunger registermgwith said graduations.

of equal length with the chamber in the bar- I rel 1 so that said pistoncompletely fills said chamber when the plunger 22 is thrust 1nwardly toengage the shoulder 25 with the flange 6, so that the operator isassured that.

all of the contents of the chamber in the barrel is discharged.

My invention is advantageous in that by reason of the rotation of thefinger-grip upon the barrel 1', the syringe may be conveniently graspedby the operator to suit his fancies and the nozzle Q-Which may bedirected laterally as shown in the drawings, may be pointed in anydirection with respect to the rotatable adjustment of said finger-grip.

. I do not desire to limit my invention to the precise detailsofconstruction and arrangement herein set forth, as it is obvious thatvarious modifications may be made therein Without departing from theessen-* tial features of my invention as defined'in the appended claims.7

claim: v I

1. A syringe comprising a barrel, having opposed shoulders, a plungerfor discharging the contentsof said barrel and having a two-partfinger-grip embracing said barrel between said shoulders in removablerelation therewith, and means forqlocking the parts of said fingergriptogethert '2. A syringe comprising a barrel and a plungerfor'discharging the contents of said plunger for discharging thecontents of said barrel, and having a finger grip provided with fingerpieces hingedly connected andhaving a hasp for securing them together.

V 5. A finger-grip for a syringe, comprising finger pieces hingedlyconnected togather and PIOVldGCl with a-haspfor securing the hingedlyconnected pieces closed 7 V 7 upon the barrel of said syringe, Having.thus described my invention, I V

35 barrel, and having a finger-grip formed or g hinged members rotatablymounted on sa d

